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A pencil costs c and an eraser costs d. Cost of 5 pencils and 4 erasers?

A9cd
B9(c + d)
C5c + 4d
D5d + 4c
Answer & Solution
Correct answer: C. 5c + 4d
Pencils cost 5 x c and erasers 4 x d, so the total is 5c + 4d.
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